Method of manufacturing receptacles



Patented Sept. 20, 1927.

UNITED STATES RUDOLF JOHANNES IBIEBER, or HAMBURG, GERMANY.

L, METHOD or MANUFACTURING RECEPTAGLES.-

Nc Drawing. Application filed September 4, 1925, Serial No. 54,581, andin Germany September 24, 1924.

It has been proposed to make receptacles, vessels, boxes, pipes, andother hollow bodies in one or in sections by constructing the walls fromthin wooden sheets, which are superposed in layers, and the pores orcells filled up by impregnating or preserving.

means. In so superposing the divers layers, their fibres are so directedthat the fibres of one layer run crosswise to those of the next layer.Such impregnated wooden plates with crosswise running fibres can beworked upon by stamping, embossing, drawing or the like. however, suchtreatment has the drawback, that the mechanical working upon, if reallydurably well shaped receptacles are to be 'made, takes comparativelylong time, and therefore does not allow a' reasonable wholesalemanufacture. Moreover, with the known method the consump-- tion' ofimpregnating matter is very considk erable and therefore expensive.

These drawbacks are removed by the present invention in such manner thattwo or more layers'of sheets glued together are used, between each twoof leaf-like thin sheets ofwood n? layer is arranged consisting ofvegetable fibresin a condition or state in which they are not naturallygrown, for instance in the shape of paper, card-board or the like,

the so composed plate or compound sheet being turned into the desiredshape of a receptacle by pressing. The vegetable fibres are preferablydisposed irregularly.

Extensive trials have proved that it is possible to turn such plates,without being previously impregnated, directly into hollow -bodies orreceptacles very expeditiously,

preferably by applying heat. In this manner for instance boxes orsimilar receptacles and vessels can be made from two veneer layers withan intermediate layer of paper or of three veneer layers (or more) withtwo intermediate layers (or more respectively) of vegetable fibres. Ithas been proved that receptacles made in this way retain their originalshape any lengthof time, and the walls have the same advantage as suchmade of wood layers, the fibres'of which run crosswise.

In order to increase the stability and the faculty of the receptacleretaining the original shape it is of advantage to create longitudinalsharp indentations by pressing or embossing. The strains that may ariseafter some time owing to humidity of air, or for" similar reasons willbe outbalanced by such:

sharp indentations orfurrows.

, I practically carry out my method in this way, that Iplacefathinveneer of. wood on the plate of a press, thereon a thincardboard 'glued on both sides, and finally a second veneer of wood, andpress .these three lubricant for instance glycerine, to make the surfacesmooth, so as to expedite the operation. 7/

I claim:

1." The method which comprises providing two thin Wood veneers ofpaper-like thickness with an intermediate thin fibrous reinforcing sheetalso of paper-like'thickness, and pressing the composite sheetthusiproduced into a dished form.

2. The method of making. receptacles which comprises applying pressureto an arrangement of two thin wood veneers of paper-like thickness withan intermediate thin fibrous reinforcing sheet of paper-like thicknessto cause them to adhere,,and then pressing the composite sheet thusproduced into a dished form. I

3. The. method of making receptacles which comprises applying heat andpressure to an arrangement of two thin wood veneers of paper-likethickness with an intermediate thin fibrous reinforcing sheet also ofpaperof making receptacles like thickness, to cause them to adhere, and

then pressing the composite sheet thus formed, with the application ofheat, into a dished form. .7

r 4. The method of making receptacles which comprises arranging a thinfabricated fibrous reinforcing sheet of paper-like thickness coated withan adhesive, between two thin wood veneers also ofpaper-like thickness,the relative thicknesses of said sheet and veneers being such that thesheet constitutes a material support for said veneers, pressing saidsheet andveneers into adherence, and further pressing the compositesheet thus produced into a dished form.

5. A receptacle comprising a body having J an impressed dished shape,comprising an integral sheet including thin wood veneers integral sheetincluding thin wood veneers of paper-like thickness in adherence to anof paper-like thickness in adherence to an intermediate sheet of paper,the relative intermediate sheet of fabricated fibrous maslightthicknesses of sai veneers and sheet 5 terial also of paper-likethickness, the relabeing such that the latter constitutes a mate- 15tive slight thickness of said veneers and sheet rial reinforcement forsaid veneers.

beingsuch that the latter constitutes amate- In testimony whereof I havesigned my rial reinforcement for said veneers. name to thisspecification.

-6. A receptacle comprising a body having 10 an impressed dished shape,comprising an v RUDOLF JOHANNES BIEBER;

